Feeding device



June 16,1931. ELODG'E 1,810,023

FEEDING DEVICE y June 16, 1931. J E LODGE 1,810,023

FEEDING- DEVICE Filed July 14, 1927 2 sheets-sheet 2 @lm #y Patented June 16, 1931 I UNITED sTA'rEs PATENT lol-llcrz JOSEPH EVERETT LODGE, OFIMZAYWOOD, II'JZIJ'JINOIS, ASSIGNOR TO 'WESTERN ELECTRIC COMPANY, INCORPORATED, OF YORK, N. Y., A CORPORATION OF NEW YORK FEELING DEVICE Application led July 14,

This invention relates to feeding devices, and more particularly to a device for feeding rubber compound in stripl form to an ex trusion machine for insulating wire.v

The primary object of this invention is to provide a simple and effective material feeding means which is responsive to a predetermined condition for varying the rate at which the material is advanced.

In order to attain these and other objects and' in accordance with the general features of the invention, one embodimentthereof includes a mechamsm wherein rubber compound in strip form is intermittently engaged and fedv forward linto an extrusion machine by a plurality of teeth reciprocated by a cam and a lever arrangement which are controlled by the extrusion' screw. The strip is maintained in its advanced positions by fixed teeth, and the-length of the feeding stroke is automatically decreased upon an `overfeed of `the material.

, `For a better understanding of this invention reference is made to the following description, taken in connection with the accompanying drawings, in which Fig. 1 is a fragmentary front end view of an extrusion machine with the feeding device attached' in operative position thereto;

Fig. 2 is a transverse sectional view of the feeding device takenA on line 2-2 of IFig. 1;

Fig-3 is4 a fragmentary vertical sectional view taken on line 3-3 of Fig. 2 showing the feeding device fastened to an extruding machine, and

Fig. 4 is a detailed elevational view of the feeding device as viewed` on line 4 4 of Fl. 3. eferringnow to the drawings wherein like numerals are employed to designate similar parts throughout the several views, a plurality of teeth 10 are fastened by means of screws 11 to a strip 12, which strip is fastened with screws 16 to a reciprocable slide 17. This slide is reciprocated in, a longitunal opening 18 in a bracket 19 and is held in a retractedposition by a spring 23 havin one of its ends fastened to a lug 24 which 1s integral with the slide 17 and the opposite end of the spring being secured to the end of a 1927. Serial No. 205,822.

housing 25 integral. with the bracket 19. Stationary teeth 26 fastened to the bracket 19 serve to prevent a rubber compound .strip 27 drivesan extrusion screw 30 within a machine frame 31. A'cam 32 fastened to andy rotatable with the extrusion screw 30 has oppositely disposed raised' portions 33 .which are adapted to engage a roller '34 at the end of a bell-crank 35. rotatably mounted on a horizontal shaft 36 between bifurcated arms,40 of a lever41 which is keyed to the shaft 36. The upper extremity of the bell-crank 35 is provided with a recess in which is inserted thel end' of a plun 'er rod 42 which is held therein by a pin 43 ig. 4).` The rod 42 passes through an aperture in the lever 41 and said rod has a coil spring 44 mounted thereon with one end of the spring bearing against the lever 41 and the other end against a winged nut 45.

The upper extremity of the lever 41 carries a horizontal arm 47 to which is fastened a link lT'he feeding device just described is fasf tened by means of bolts 56 to a throat portion 57 of the extrusion machine 31, as clearly `shown in Fig. 3.' Upon rotation of the cam 32 the roller 34 will follow the surfaces of the raised portion 33 and arm 35 will be swung outwardly. rThis motion is transmitted to the plunger 42, and if the pressure occasioned by the teeth 10 bearing against the strip'27 is less than the pressure necessary to compress the spring 44, the slide 17 and associated teeth will be advanced against the opposing pull of spring 23. rlhis movement carries the compound strip 27 forwardA into the throat 57 of the extrusion machine 31 where the rotating screw 30 forces it outward into a wire extruding device (not shown). In the event -44 through the action of the plunger rod 42.

In the operation of the feeding device, the belt 28 driven by a source of power (not shown) rotates the extrusion screw 30 and the cam 32 attached thereto. Rotation of the camcauses the actuation ofthe bell-crank 35 which is connected to the material advancing slide 17. The outward swing of the bell-crank forces the slide 17 forward against the opposing pull of the sprin 23. This forward movement causes the teet 10 of the slide to en age the strip material 27, thereby feedin it om a reel or other supply (not shown and to continuously advance the material into the extrusion screw. From the foregoing it will be understood that the invention provides a very effective means for expeditiously and continuously feeding strip material to a screw mechanism or other suitable receiving means.

Although the invention as herein described and illustrated is particularly well adapted for use in connection with extrusion machines, it should be understood that the novel features are capable of other applications and.

ap ended claims.

at is claimed is:

1. In material feedin apparatus, movable means for engaging an feeding material in strip form, means for maintaining the material in an advanced position, and means responsive to a predetermined condition for varying the extent of movement of the feeding means to thereby4 vary the rate at which the material is advanced.

2. In material feeding apparatus material receiving means, means controlled by the receiving movable means for "engaging and feeding material in strip form thereto, means for maintaining the material in an advanced position, and means for decreasing the extent of movement of the feeding means when the force exerted by the feeding means upon the material exceeds a predetermined amount. y

3. In material feeding apparatus, a receiving means, reciprocating means for engaging and feeding material in strip form to the receiving means, a cam mechanism associated with the receiving means, the material engaging'and feeding means being operable in response to the'actuat-ion of the cam mechanism, and means responsive to 'variations in the amount of material in the receiving means should be limited only by the scope of the for controlling the length of feeding stroke of- .ing the feed when the force exerted by the tooth upon the material exceeds a predetermined amount. v

5. In material feeding apparatus, a feeding screw, a plurality of tooth elements for feeding material in strip form to the screw, a cam and lever mechanism for reciprocating the tooth elements, a stationary tooth element for maintaining the strip in an advanced position during the retraction of the feeding tooth elements, and means for decreasing the feed when the force exerted by the tooth elements upon the material exceeds a predetermined amount. y

6. In material feeding apparatus, a material advancing screw, a cam attached thereto, a slide, a plurality of teeth carried thereby, a bell crank associated with the cam and adapted to actuate the slide, a bracket supporting the slide, a coiled `spring for retractv ing the slide, means for actuating the screw,

a plurality of stationary toothed elements attached to the bracket for maintaining a strip of material in advanced position, and means controlled by the screw for decreasing the feed when'the force exerted by the movable teeth upon the material exceeds a predetermined amount.

7. In material feeding apparatus, a material advancing screw, a plurality of teeth for feeding material to the screw, means controlled by the screw for actuating the teeth, means comprising a plunger rod, a spring and a bifurcated lever for 4decreasing the feed when the force exerted by the teeth upon the material exceeds the pressure of the spring.

8. In material' feeding apparatus, reciprocating means for engaging and feeding material, and means responsive to an overfeed of the material for decreasing the length of feeding stroke of the feeding means to thereby decrease the rate at which the material isfed.

9. In material feeding apparatus reciprocating means for advancing materia a mem- .rial is advanced.

10. In material feeding apparatus, reciprocating means foradvancing material, a stationary resilient means for maintaimng the material in advanced position during the reber engaging the material for maintaining traction of the reciprocating means, and means responsive to an overfeed of the material for decreasing the rate at which the material is advanced.

5 a 11. In a material feeding apparatus, a y movable material engagin element, means for-moving the element to eed the material, and means responsive to a predetermined condition for varying the movement of the ele- 1, ment. c

12. In a material feeding apparatus, a receiving means, a movable material engaging element, means for moving the element to advance the material to `the receiving means,

5. and means responsive to an over-feed of material for decreasing the movement of the element.

In witness whereof, I- hereunto subscribe my name this 29th dagf June, A. D. 1927. 20 JOSEPH E RETT LODGE. 

